High ambient temperature greatly affects the battery service life. When the temperature rises, the corrosion of the battery plate will increase, and more water will be consumed, thus shortening the battery life. The battery can obtain a long life at 25 ° C, and the service life is reduced by about half if the long-term operating temperature is increased by 10 ° C.
The storage battery should be placed in a ventilated, dry place, away from heat sources, and not prone to spark, with a safety distance of more than 0.5m. In the ambient temperature of 25 ° C ~ 0 ° C, for every drop of 1 ° C, its discharge capacity is reduced by about 1%, so the battery should work in a 25 ° C ~ 20 ° C environment.

(1) The relationship between temperature and capacity battery (valve-controlled battery) is 25℃, and the capacity of the battery is 100%; Below 25 ° C, the capacity of the battery will be reduced by half for every 10 ° C increase. The capacity of the valve-controlled battery changes with the temperature, and the maintenance personnel must carefully adjust the discharge current of the battery according to the actual temperature change, and at the same time control the temperature of the battery to keep it within 22 ° C ~25 ° C.

(2) Thermal runaway phenomenon Because the valve-controlled battery uses a poor liquid design, the electrolyte injected in the battery is adsorbed on the glass fiber board, when the charging current increases, it is necessary to release the gas through the safety valve, resulting in battery water loss, internal resistance increases, capacity attenuation and a lot of heat generated during charging and discharging. If the heat is not diffused enough to make the temperature surge, it will form a thermal runaway. The causes of thermal runaway are not to reduce the floating charge pressure in time, the safety valve is not strict the opening valve pressure is too low, etc. If the discharge is severe in the case of thermal runaway, it is possible to make the battery's instantaneous voltage drop and the battery shell temperature rise to 70 ° C ~80 ° C, so the thermal runaway problem must be paid great attention to.

Through the above analysis, the maintenance of the valve-controlled battery has some understanding, to do a good job of the maintenance of the valve-controlled battery must be:

a. If conditions permit, install air conditioners in the battery room and control the temperature between 22 ° C and 25 ° C.
This not only extends the life of the battery but also enables the battery to have the best capacity.
b. In any case, the floating charge voltage of the battery should not exceed the floating charge value given by the manufacturer, and according to the change of ambient temperature, the voltage adjustment coefficient of ±3mV/℃ is used at any time to adjust the floating charge voltage value.
c. Given the influence of disequilibrium on valve-controlled batteries, the lower limit of floating charge voltage should be used for floating charge power supply.
d. After the battery imbalance is relatively large or at a depth of discharge, and when the battery runs for a quarter, the battery should be charged in a balanced way. Pay attention to the ambient temperature change during balanced charging, and reduce the set value of balanced voltage with the increase of ambient temperature. For example, if the ambient temperature increases by 1 ° C, the voltage value of the balanced charge needs to be reduced by 3mV.